site_archiver@lists.apple.com Delivered-To: darwin-kernel@lists.apple.com Thread-index: AcaCan6sRzOd+ntfTm2+XFy36oa9iwAABQIw I'm trying to write a small Kext that uses the Kauth apis to register for file events and then notifies a userland program to take action when files of certain types appear. Using Kauth itself seems to be no problem. I just followed the instructions and examples here: http://developer.apple.com/technotes/tn2005/tn2127.html and http://developer.apple.com/samplecode/KauthORama/index.html The problem I'm having is figuring out how to communicate back out from my Kext to userland. TN2127 uses the example of an anti-virus program, which is conceptually similar to what I'm trying to do, and specifically suggests having the Kext pass a request to a user space daemon. However it doesn't provide any suggestion or example wrt exactly how I might go about communicating from the Kext to said daemon. This document: http://developer.apple.com/documentation/Darwin/Conceptual/KernelProgramming /boundaries/chapter_14_section_1.html describes a number of mechanisms for communication between the kernel and userland, but is oriented towards calling from userland into the kernel, which is exactly the opposite of what I'm trying to do. Meanwhile, this document: http://developer.apple.com/documentation/Darwin/Conceptual/NKEConceptual/con trol/chapter_3_section_3.html suggests using kev_message_post to send notifications from an NKE to a userland process. However it doesn't provide any examples or documentation for using said API, and a Google search for "kev_message_post" returns exactly one result: the same document on Apple's web site. I also looked at using BSD sockets, but the only documentation I could find on opening a socket from the kernel is here: http://developer.apple.com/documentation/Darwin/Reference/KPI_Reference/kpi_ socket/index.html Doesn't really explain how to use the apis or fill in the structs you need to pass in, just lists the methods and the parameters they take. I did find one example using this api, here: http://darwinsource.opendarwin.org/10.4.2/webdavfs-214.1/webdav_fs.kextproj/ webdav_fs.kmodproj/webdav_vnops.c But it's pretty obscure for someone who's experience with bsd networking is limited to bind(), listen(), accept(), read(), etc. I have no idea what a msghdr or an iovec is, and there doesn't seem to be much in the way of documentation or examples out there. Oh, and I also tried looking into using Mach ports, but again I couldn't find any examples or documentation. So, first of all what mechanism should I be using, and second, how do I use I use it? Any example code anyone can provide would be very welcome. Thanks, Bruce Fancher _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.a... This email sent to site_archiver@lists.apple.com